feat(frontend): implement OneSec services

[DenysKarmazynDFINITY]

Motivation

• Adds onesec-swap.services.ts with four exported functions that wrap the onesec-bridge SDK: fetchOneSecEvmToIcpQuote, fetchOneSecIcpToEvmQuote, executeOneSecIcpToEvmBridge,
  and executeOneSecEvmToIcpBridge
• Quote functions share a private resolveQuoteFromPlan helper that runs the plan's fee-check step and maps the result to SwapMappedResult
• EVM → ICP execution uses the forwarding address pattern: build plan → run fee step → retrieve deterministic forwarding address → send EVM tokens via OISY's send service →
  run remaining SDK steps (notify, validate, wait for ICP tx)
• ICP → EVM execution runs all SDK steps sequentially, keeping the UI at INITIALIZATION for step 0 (fee check) and advancing to SWAP for steps 1+
• Adds a full Vitest suite (27 tests) covering guard conditions, both quote directions, both execution paths, progress reporting order, and all failure branches including setFailedProgressStep callbacks